Circular sawing machine



(No Model.) 3 sheets-sheen 1 04. P. GERLAOH.

A CIRCULAR SAWING- MACHINE.

No. 372,904. Patentd Nov. 8, 1887.

(No Model'.)

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CIRCULAR SAWINGr MACHINE.

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.0. F. GERLACH. CIRCULAR SAWING MACHINE.

No. 372,904. Patented Nov. 8, 1887.

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l vUNITED STATES PATENT trice.

CHARLES F. GERLACH, OF MILWAUKEE, WISCONSIN.

CIRCULAR, sAwiNe MACHINE.

SPECIFICATION forming part of Letters Patent No. 372,904, dated November 8, 1887.

Application filed May 31, 1587. Serial No. 239,779. (No model.)

To all whom, it may concerm Be it known that I, CHARLns F. GERLAOH, of Milwaukee, in the county ofMilwaukeaand 1n the State of Wisconsin, have invented certa1n new and nsefullmprovements in Circular Sawing Machines; and I do hereby declare that the following is a full, clear, and eXact description thereof.

My invention rela-fes to circular sawing machines; and it consists in certain peculiarities of construction and combination of parts, to be hereinafter describedI with reference to the accompanying drawings, and subsequently claimed.

In the drawings, Figure l represents an elevation of -t-he drive Vside of a circular sawing machine constructed according to my invention, the driving-gear for the feeder being illustrated in dotted lines; Fig. 2, a similar view of the opposite side ofthe machine; Fig. 3,a detail view illustrating the adj usting-lever; Fig. 4, an under side plan view of a portion of the guard; Fig. 5, a plan `View ofthe machine partly broken away; Figs. 6 and 7, detail sectional views of the guard and guide; Fig. 8, a plan view of the guide,partly in section; Figs. 9, 10, and 1l, detail sectionalvews of the nut that engages the adjusting-screw for the feedarm of the machine.

Referring by letter to the drawings, A represents a frame, to which is hinged thel forward end of a table, B, the rear end of the latter being supported on an adjusting-screw, C, operative ina transverse timber of said frame.

Journaled in suitable bearings on the frame A is the arbor D of a circular saw, E, said ar,-

bor carrying a pulley, F, over which and a pulley, G, on a drive-shaft, H, is passed abelt, I. The drive-shaft H carries another pulley, J, over which and a pulley, K, on a shaft, L, journaled in suitable bearings at the rear end of the frame and beneath the table,is passed a belt, M. Fast on the saw-arbor D is the usual cone-pulley, D', over which and a similar pulley, H', on the drive-shaft H (shown in dotted lines, Fig. 5) is passed a belt, H2, this oonstruction serving to regulate the speed of the saw. Rigidly connected to the shaft L is the" longitudinal portion ofV an angle'arm, N, and journaled in the transverse portion of this arm is the arbor O of a feeder, P, the latter being adjustable on said arbor. Fast on the hub of thepulley K is a pinion, Q,'that meshes with a gear-wheel, R, journaled to the longitudinal portion of the angle-arm N, said gear-wheel also meshing with a similar wheel, S, on the arbor of the feeder P.

Swiveled in the longitudinal portion of the arm N is a nut, N', for an adjusting-screw, T, vthat bears against an inclined block, a, on the frame A, and is preferably provided with a removable hand-wheel, T'. The nut N' is preferably provided with a removable section. b, that is held in position against the screw T by means of a set-screw, c. VThe removable section b and the recess b in the main portion of the nut N', that receives said section, have their sides correspondingly beveled on lines struck from the center of the bore for the adjusting-screw T. When the adjusting-screw T and bore of the nut N' have become worn by frictional contact, I remove the section b of said nut, and by ling or grinding reduce the beveled sides thereof, so that this section may be adj usted in the recessed main portion of said nut to come snug against said adjustingscrew. In other words, I am enabled by the above-described construction and operation to reduce the bore of the nut N' so that it will at all times exactly correspond to the diameter of the adj Listing-screw T.

Detachably connected to the transverse portion of the angle-arm N is a guard, U, for the saw E and feeder P, and this guard is provided with a depending pressure-foot, U', that comes between said saw and feeder to hold the mate rial down against the table.

Mortised in the table B is a transverse plate, V, having a dovetailed slot, d, that receives the dovetailed portion e of an arm, IV', belonging to the guide W', said arm being preferably arranged in front of the anti-friction roll B', that is journaled in the machine-table B, said table being also provided with a spreader, B2. The arm YV of the guide W is provided with a screw-threaded aperture, e', for a conical-pointed set-screw, f, that cornes against the conical point of a pin, g, thelatter being arranged in the dovetailed portion of said arm at right angles to the set-screw, so that its head g will bear upon the bottom of said dovetailed groove.

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Vhen the guide is adjusted to the desired position, the set-screw f is tightened, and by its travel against the pin g causes the guidearIn W to rise up and bind in the grooved plate V, whereby said, guide is securely retained in its adjusted position.

Vhen the material to be sawed varies but slightly in thickness, I adjust the feeder-arm N to the requisite elevation by means of the screw T; but in case the material is crooked or more than ordinarily thick, and it is therefore desirable to raise said arm to its greatest elevation in less time than can be done bysaid screw, I employ the following construction: Keyed to that end of the shaft L farthest from the pulley K is a disk, X, provided with notches h, to receive the turned-in ends z' of a springsegment, X. The disk X is arranged on the shaft L between the bifurcated end j of a plate, k, bolted to the adjacent end of au arm, Y, said plate being loosely fitted to said shaft. The plate L has a bearing for the screw-th readed end of a rod, Y', and another bearing is provided for said rod in the front end of the arm Y. The screw-threaded end of the rod impinges against the spring-segment X', and said rod is turned by means of a crank or wrench, Y2. rIhe rear end of the arm Y rests on alug, m, projecting inward from a hand-lever, Z, fulcrumed to the frame A and limited in its movement by stops n, extended outward from a segment-plate, Z', rigidly connected to said frame.

Vhen it is desired to elevate the feeder-arm by the means just described, I tighten the rod Y/ to force the spring segment X tight against the periphery of the notched disk X and pull the lever Z rearward, this operation causing the shaft L to turn backward in its bearings and raise said arm.

Then it is not desirable to employ the feeder, the guard U is detached from the arm N, and the latter, with the parts carried thereby, is swung over and down against the rear end of the frame, as shown by dotted lines, Fig. 1, thus leaving a clear table.

The outer bearing, o, for thesaw-arbor is on a removable section, A, of the frame A, and by this construction I am enabled to readily change the pulley F on said arbor.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a circular sawing machine, the combination of a frame, table, and saw with a shaft having its bearings on said frame beneath the table, an angle-aim arranged on the shaft, a feeder having its arbor journaled in the anglearm, and suitable mechanism for driving said saw and feeder, as set forth.

2. In a circular sawing machine, the combination of a frame, table, and saw with a shaft having its bearings on said frame beneath the table, an angle-arm arranged on the shaft, a feeder having its arborjournaled in the anglearm, an adjusting-screw operative in said arm, and suitable mechanism for driving said saw and feeder, as set forth. 3. In a circular sawing machine, the comblnation of a frame, table, and saw with a shaft ,having its bearings on said frame, an anglearm arranged on the shaft, a feeder having its arborjou rnaled in the angle-arm, a disk keyed on said shaft, a spring-segment arranged adjacent to the periphery of the disk, au arm carrying a set-rod for impingement against the spring-segment, a lever for'adjusting the rodarm, and suitable mechanism for driving the saw and feeder, as set forth.

4. In a circular sawing machine, the combination ofa frame, table, and saw with a shaft having its bearings on said frame beneath the table, an angle-arm arranged on the shaft, a feeder having its arbor journaled in the anglearm, a guard connected to said arm and having a depending pressure-foot, and suitable mechanism for driving said saw and feeder, as set forth.

5. In a circular sawing machine, the combination of a frame, table, and saw with a shaft having its bearings on the fraaie beneath the table, an angle-arm arranged on the shaft,a feeder having its arbor journaled inthe anglearm, a nut swivelod in said arm, an adjustingscrew operative in said nut,and suitable mechanism for driving said saw and feeder, as set forth.

6. In a circular sawing machine, the combination of a frame, table, and saw with a shaft having its bearings on the frame, an anglearm arranged 011 the shaft,a feeder having its arbor journaled in the angle-arm, a nut swiveled in said arm and provided with a detachable section, a set-screw for holding said section in place, an adj listing-screw operative in the nut, and suitable mechanism for driving said saw and feeder, as set forth.

7. In a circular sawing machine, thc combination of a table and saw with a plate connected to the table and provided with a dovetailed slot, a guide having an arm adj ustably fitted in said slot, a conical-pointed pin arranged in the guide-arm to have its head impingc against thc bottom of said slot, a setscrew also provided with a conical point and arranged in said arm to impingc against the pin-point, and suitable mechanism for driving the saw, as set forth.

In testimony that I claim the foregoing I have hereunto set my hand, at Milwaukee, in the county of Milwaukee and State of \Visconsin, in the presence of two witnesses.

CHARLES F. GERLACH.

Witnesses:

DAVID Briten, N. E. OLIPHANT.

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